Determination of forces in extensor pollicis longus and flexor pollicis longus of the thumb

K. N. An, W. P. Cooney, E. Y. Chao, L. J. Askew, J. R. Daube

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

A mathematical model was developed to calculate internal forces in the thumb. The solution was indeterminate, since the number of unknown forces exceeded the equations available in the static force analysis. To resolve the problem, the muscle forces were obtained in conjunction with quantitative electromyographic data. The relationship between muscle force and integrated electromyograms (IEMG) was obtained in terms of polynomial function. A multiple-polynomial regression analysis of the measured force and IEMG data was used to determine the correlation coefficients. Then the muscle forces were calculated with the thumb performing tip, key, and pulp pinches and grasp. The muscle forces were found to be in the range of 3-120 N for the flexor pollicis longus and 4-40 N for the extensor pollicis longus.

Original languageEnglish (US)
Pages (from-to)714-719
Number of pages6
JournalUnknown Journal
Volume54
Issue number3
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Physiology
  • Endocrinology

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